<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .box{
            width: 300px;
            height: 300px;
            background-color: #dadcdc;
        }
    </style>
    <script src="my-angular.js"></script>
</head>
<body>
<div ng-app="">
    <input type="text" ng-model="a">
    <input type="text" ng-model="b">
    <div class="box" ng-bind="a*b">

    </div>
</div>

</body>
<script>

</script>
</html>